IV PREFACE. 



Of the eight birds described and named as new by 

 Forster at the end of this memoir, six, according to the 

 most recent authorities on North American birds, are 

 entitled to remain under Forster's designation, namely, 



Falco saccr, Forst. = Hierofalco gyrfaico var. sacer (Forst.) 

 Strix nebulosa, Forst. = Syrnuwi nebulosum (Forst.) 

 Emberiza leucophrys, Forst. ^ Zojiotrichia leucophrys (Forst.) 

 Muscicapa striata, Forst. -^^ Dendrccca striata (Forst.) 

 Parus hudsoniciis, Forst. = Parus hudsoniciis (Forst.) 

 Scolopax borealis, Forst. = Numenius borealis (Forst.) 



But it has been pointed out to me by Prof. Newton, 

 and, I think, correctly, that the species described by Forster 

 as Falco saccr is not the American form of Hierofalco 

 gyrfaico as commonly supposed, but Astiir atricapilhis. 



Of the remaining two species described in the Appendix, 

 Fringilla Jmdsonias of Forster is usually identified with 

 Jiinco hycinalis (Linn.), and his Anas nivalis with A user 

 Jiypcrborcns (Pallas). 



Falco spadiccHs, shortly mentioned as a new species 

 in the first part of the memoir (p. 383), is commonly 

 referred to Circns Jiudsonius (Linn.). 



P. L. S. 



II, Hanover Square, London, W. 

 March 2\st, 1882. 



